U2124 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2124 indicates that there is a loss of communication between the vehicle’s control module and the steering angle sensor, which may affect systems that rely on steering input for operation.

The severity of ODBII code U2124 is generally considered moderate.

Common Causes For: U2123 Lost Communication with Vehicle Dynamics Control Module.

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning vehicle control module
• Software issues or bugs
• Corrosion in connectors or terminals
• Interference from other electronic components
• Low battery voltage or power supply issues

Common misdiagnosis for U2124 Lost Communication with the Steering Angle Sensor.

• Faulty Steering Angle Sensor
• Wiring Issues or Short Circuits
• Faulty Body Control Module (BCM)
• Faulty Electronic Power Steering (EPS) Module
• Incorrectly calibrated steering angle sensor
• Faulty ABS Module
• Software or Firmware Issues
• Battery or Power Supply Problems

Common Troubleshooting Steps

When dealing with the OBD-II code U2124, which indicates “Lost Communication with the Steering Angle Sensor,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues.
• Inspect Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors associated with the steering angle sensor for any signs of damage, corrosion, or loose connections.
• **Connector Pins: Ensure that the pins in the connectors are not bent, corroded, or pushed back.
• Test the Steering Angle Sensor: **Sensor Functionality: If possible, test the steering angle sensor using a multimeter or scan tool to ensure it is functioning correctly. Check for proper voltage and resistance values as specified in the vehicle’s service manual.
• **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check if calibration is necessary.
• Check the CAN Bus Communication: **Network Integrity: Inspect the CAN bus wiring for shorts, opens, or other issues. Use a scan tool to monitor the CAN bus for communication errors.
• **Other Modules: Ensure that other modules on the CAN bus are functioning correctly, as a fault in another module can affect communication.
• Inspect the Power and Ground: **Power Supply: Verify that the steering angle sensor is receiving the correct voltage. Check the vehicle’s wiring diagrams for the correct power and ground locations.
• **Ground Connections: Ensure that all ground connections are clean and secure.
• Check for Software Updates: **ECU Updates: Check if there are any software updates available for the vehicle’s ECU that may address communication issues.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the steering angle sensor or communication issues for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations.
• Professional Diagnosis: If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose complex issues. By following these steps, you should be able to identify and resolve the issue related to the U2124 code. Always refer to the vehicle’s service manual for specific procedures and specifications.